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采用数值模拟与试验相结合的方法研究了某旋风燃烧器内煤颗粒的燃烧及沉积特性.结果表明:该燃烧器在不同负荷下均能实现高温燃烧(1 700K以上),并获得较高的燃烧效率及捕渣率.煤颗粒主要在燃烧器前部沉积,且上下壁面的分布几乎一致;较小的煤颗粒跟随性好,不易沉积,60μm以上的煤颗粒几乎能在燃烧器中前部全部沉积下来并附壁燃烧;较小的过量空气系数及适中的一次风率(0.3～0.35左右)能保证煤颗粒在燃烧器内壁面上沉积分布较均匀,不至于造成低温区域燃烧通道煤粉堵塞.
The combustion and deposition characteristics of coal particles in a cyclone combustor were studied by means of numerical simulation and experiments.The results show that the combustor achieves high temperature combustion (more than 1 700K) under different loads and achieves higher Combustion efficiency and capture rate of coal particles are mainly deposited in front of the burner, and the distribution of the upper and lower walls are almost the same; smaller coal particles with good follow-up, difficult to sediment, coal particles above 60μm can be almost in the burner front All deposited and attached to the wall combustion; small excess air coefficient and the moderate primary wind (0.3 ~ 0.35 or so) to ensure that the coal particles in the burner wall deposition and distribution of more uniform, will not result in low-temperature combustion zone pulverized coal Clogged.